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author | Sverker Eriksson <[email protected]> | 2019-02-06 19:10:26 +0100 |
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committer | Sverker Eriksson <[email protected]> | 2019-02-06 19:10:26 +0100 |
commit | 98cfd6016f8b40fc97e03b31177d14318349040f (patch) | |
tree | c0fcdd768071c36bfbcbf186d369d9ca14c47421 /erts/emulator/beam/index.c | |
parent | e2ca71b6e7172b320b5b171359d53a161383fb19 (diff) | |
parent | 3825199794da28d79b21052a2e69e2335921d55e (diff) | |
download | otp-98cfd6016f8b40fc97e03b31177d14318349040f.tar.gz otp-98cfd6016f8b40fc97e03b31177d14318349040f.tar.bz2 otp-98cfd6016f8b40fc97e03b31177d14318349040f.zip |
Merge tag 'OTP-21.2' into sverker/map-from-ks-vs-bug
Diffstat (limited to 'erts/emulator/beam/index.c')
-rw-r--r-- | erts/emulator/beam/index.c | 15 |
1 files changed, 11 insertions, 4 deletions
diff --git a/erts/emulator/beam/index.c b/erts/emulator/beam/index.c index 26d6c04ea0..be1771b037 100644 --- a/erts/emulator/beam/index.c +++ b/erts/emulator/beam/index.c @@ -1,7 +1,7 @@ /* * %CopyrightBegin% * - * Copyright Ericsson AB 1996-2016. All Rights Reserved. + * Copyright Ericsson AB 1996-2017. All Rights Reserved. * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. @@ -27,7 +27,7 @@ #include "global.h" #include "index.h" -void index_info(int to, void *arg, IndexTable *t) +void index_info(fmtfn_t to, void *arg, IndexTable *t) { hash_info(to, arg, &t->htable); erts_print(to, arg, "=index_table:%s\n", t->htable.name); @@ -58,7 +58,7 @@ IndexTable* erts_index_init(ErtsAlcType_t type, IndexTable* t, char* name, int size, int limit, HashFunctions fun) { - Uint base_size = ((limit+INDEX_PAGE_SIZE-1)/INDEX_PAGE_SIZE)*sizeof(IndexSlot*); + Uint base_size = (((Uint)limit+INDEX_PAGE_SIZE-1)/INDEX_PAGE_SIZE)*sizeof(IndexSlot*); hash_init(type, &t->htable, name, 3*size/4, fun); t->size = 0; @@ -91,9 +91,16 @@ index_put_entry(IndexTable* t, void* tmpl) t->seg_table[ix>>INDEX_PAGE_SHIFT] = erts_alloc(t->type, sz); t->size += INDEX_PAGE_SIZE; } - t->entries++; p->index = ix; t->seg_table[ix>>INDEX_PAGE_SHIFT][ix&INDEX_PAGE_MASK] = p; + + /* + * Do a write barrier here to allow readers to do lock free iteration. + * erts_index_num_entries() does matching read barrier. + */ + ERTS_THR_WRITE_MEMORY_BARRIER; + t->entries++; + return p; } |